Alpha‐tACS Improves Executive Function and Alpha Power Spectral Density in Patients With Post‐Stroke Cognitive Impairment. - Kong, Weicheng; Song, Jian; Li, Yanyan; Zhao, Yuqing; Wang, Xinyang; Shi, Haoran; Cai, Jiayu; Wei, Wei; Xue, Xiehua (CNS Neuroscience & Therapeutics, 2026)